blob: 80a05591a140322e3e63d94ca510a45af72cb8d2 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
#!/bin/bash
[[ -z $TC ]] && TC='tc'
[[ -z $IP ]] && IP='ip'
REDIRECT_USER='./tc_l2_redirect'
REDIRECT_BPF='./tc_l2_redirect_kern.o'
RP_FILTER=$(< /proc/sys/net/ipv4/conf/all/rp_filter)
IPV6_FORWARDING=$(< /proc/sys/net/ipv6/conf/all/forwarding)
function config_common {
local tun_type=$1
$IP netns add ns1
$IP netns add ns2
$IP link add ve1 type veth peer name vens1
$IP link add ve2 type veth peer name vens2
$IP link set dev ve1 up
$IP link set dev ve2 up
$IP link set dev ve1 mtu 1500
$IP link set dev ve2 mtu 1500
$IP link set dev vens1 netns ns1
$IP link set dev vens2 netns ns2
$IP -n ns1 link set dev lo up
$IP -n ns1 link set dev vens1 up
$IP -n ns1 addr add 10.1.1.101/24 dev vens1
$IP -n ns1 addr add 2401:db01::65/64 dev vens1 nodad
$IP -n ns1 route add default via 10.1.1.1 dev vens1
$IP -n ns1 route add default via 2401:db01::1 dev vens1
$IP -n ns2 link set dev lo up
$IP -n ns2 link set dev vens2 up
$IP -n ns2 addr add 10.2.1.102/24 dev vens2
$IP -n ns2 addr add 2401:db02::66/64 dev vens2 nodad
$IP -n ns2 addr add 10.10.1.102 dev lo
$IP -n ns2 addr add 2401:face::66/64 dev lo nodad
$IP -n ns2 link add ipt2 type ipip local 10.2.1.102 remote 10.2.1.1
$IP -n ns2 link add ip6t2 type ip6tnl mode any local 2401:db02::66 remote 2401:db02::1
$IP -n ns2 link set dev ipt2 up
$IP -n ns2 link set dev ip6t2 up
$IP netns exec ns2 $TC qdisc add dev vens2 clsact
$IP netns exec ns2 $TC filter add dev vens2 ingress bpf da obj $REDIRECT_BPF sec drop_non_tun_vip
if [[ $tun_type == "ipip" ]]; then
$IP -n ns2 route add 10.1.1.0/24 dev ipt2
$IP netns exec ns2 sysctl -q -w net.ipv4.conf.all.rp_filter=0
$IP netns exec ns2 sysctl -q -w net.ipv4.conf.ipt2.rp_filter=0
else
$IP -n ns2 route add 10.1.1.0/24 dev ip6t2
$IP -n ns2 route add 2401:db01::/64 dev ip6t2
$IP netns exec ns2 sysctl -q -w net.ipv4.conf.all.rp_filter=0
$IP netns exec ns2 sysctl -q -w net.ipv4.conf.ip6t2.rp_filter=0
fi
$IP addr add 10.1.1.1/24 dev ve1
$IP addr add 2401:db01::1/64 dev ve1 nodad
$IP addr add 10.2.1.1/24 dev ve2
$IP addr add 2401:db02::1/64 dev ve2 nodad
$TC qdisc add dev ve2 clsact
$TC filter add dev ve2 ingress bpf da obj $REDIRECT_BPF sec l2_to_iptun_ingress_forward
sysctl -q -w net.ipv4.conf.all.rp_filter=0
sysctl -q -w net.ipv6.conf.all.forwarding=1
}
function cleanup {
set +e
[[ -z $DEBUG ]] || set +x
$IP netns delete ns1 >& /dev/null
$IP netns delete ns2 >& /dev/null
$IP link del ve1 >& /dev/null
$IP link del ve2 >& /dev/null
$IP link del ipt >& /dev/null
$IP link del ip6t >& /dev/null
sysctl -q -w net.ipv4.conf.all.rp_filter=$RP_FILTER
sysctl -q -w net.ipv6.conf.all.forwarding=$IPV6_FORWARDING
rm -f /sys/fs/bpf/tc/globals/tun_iface
[[ -z $DEBUG ]] || set -x
set -e
}
function l2_to_ipip {
echo -n "l2_to_ipip $1: "
local dir=$1
config_common ipip
$IP link add ipt type ipip external
$IP link set dev ipt up
sysctl -q -w net.ipv4.conf.ipt.rp_filter=0
sysctl -q -w net.ipv4.conf.ipt.forwarding=1
if [[ $dir == "egress" ]]; then
$IP route add 10.10.1.0/24 via 10.2.1.102 dev ve2
$TC filter add dev ve2 egress bpf da obj $REDIRECT_BPF sec l2_to_iptun_ingress_redirect
sysctl -q -w net.ipv4.conf.ve1.forwarding=1
else
$TC qdisc add dev ve1 clsact
$TC filter add dev ve1 ingress bpf da obj $REDIRECT_BPF sec l2_to_iptun_ingress_redirect
fi
$REDIRECT_USER -U /sys/fs/bpf/tc/globals/tun_iface -i $(< /sys/class/net/ipt/ifindex)
$IP netns exec ns1 ping -c1 10.10.1.102 >& /dev/null
if [[ $dir == "egress" ]]; then
# test direct egress to ve2 (i.e. not forwarding from
# ve1 to ve2).
ping -c1 10.10.1.102 >& /dev/null
fi
cleanup
echo "OK"
}
function l2_to_ip6tnl {
echo -n "l2_to_ip6tnl $1: "
local dir=$1
config_common ip6tnl
$IP link add ip6t type ip6tnl mode any external
$IP link set dev ip6t up
sysctl -q -w net.ipv4.conf.ip6t.rp_filter=0
sysctl -q -w net.ipv4.conf.ip6t.forwarding=1
if [[ $dir == "egress" ]]; then
$IP route add 10.10.1.0/24 via 10.2.1.102 dev ve2
$IP route add 2401:face::/64 via 2401:db02::66 dev ve2
$TC filter add dev ve2 egress bpf da obj $REDIRECT_BPF sec l2_to_ip6tun_ingress_redirect
sysctl -q -w net.ipv4.conf.ve1.forwarding=1
else
$TC qdisc add dev ve1 clsact
$TC filter add dev ve1 ingress bpf da obj $REDIRECT_BPF sec l2_to_ip6tun_ingress_redirect
fi
$REDIRECT_USER -U /sys/fs/bpf/tc/globals/tun_iface -i $(< /sys/class/net/ip6t/ifindex)
$IP netns exec ns1 ping -c1 10.10.1.102 >& /dev/null
$IP netns exec ns1 ping -6 -c1 2401:face::66 >& /dev/null
if [[ $dir == "egress" ]]; then
# test direct egress to ve2 (i.e. not forwarding from
# ve1 to ve2).
ping -c1 10.10.1.102 >& /dev/null
ping -6 -c1 2401:face::66 >& /dev/null
fi
cleanup
echo "OK"
}
cleanup
test_names="l2_to_ipip l2_to_ip6tnl"
test_dirs="ingress egress"
if [[ $# -ge 2 ]]; then
test_names=$1
test_dirs=$2
elif [[ $# -ge 1 ]]; then
test_names=$1
fi
for t in $test_names; do
for d in $test_dirs; do
$t $d
done
done
|
